when a patient has a small mouth or low palatal vaults
100
what are the components of the panoramic unit
exposure controls, x-ray tubehead, head positioner
100
what happens if the patient's teeth are positioned too far back on the bite block
the anterior will appear fat
100
what 3 items are important when mounting x-rays
knowing the anatomy of the maxillary and mandible, mount the films in the order of the teeth, label the mount with the patient's name and date before mounting the films.
100
what will happen if a patient doesn't remove his or her earrings or glasses while taking a pano
a blurred area and a ghost image will appear
200
the 3-D imaginary curved area or space, shaped like a horseshoe is what
the focal trough
200
What affects the quality of dental radiographs
film sensor placement, exposure, processing
200
what occurs if the patient's chin is too high during the pano
a reverse smile line will appear on the image
200
what happens with the patient doesn't place their tongue on the palate while taking a panoramic image
a dark radiolucent shadow obscures the apices of maxillary teeth
200
how many posterior periapical films are taken when using the paralleling technique
8
300
what is the cause of a panoramic image that comes out with a radiopaque cone-shaped artifact
patient's lead apron was incorrectly placed or a thyroid collar was used.
300
a ghost image will appear _____ than normal and on the ____ side of the image
larger; opposite
300
what is it called when the central ray of the x-ray beam is not centered on the film sensor resulting in a partial image
cone cut
300
what is the correct position of the Frankfort plane
parallel to the floor
300
when is skull radiography used
oral surgery and orthodontics
400
Differs according to the technique being used, refers to the up and down plane, can be determined in degrees marked on the outside of the tubehead refers to what??
vertical angulation
400
is it true that the CBCT is a little difficult to learn to use and requires a lot of parctice
no
400
what way does the x-ray face in the mouth
the white side is placed towards the teeth
400
why is the paralleling technique recommended
it provides the most accurate image with the least amount of radiation exposure.
400
what are 3 advantages to panoramic imaging
the entire maxilla and mandible are seen in one image, it is easy and quick to learn how to expose a pano, patient's prefer them and they are exposed to less radiation
500
what is used to diagnose lesions and plan implant cases
computed tomography
500
how is the patient's head positioned while taking maxillary and mandibular x-rays
maxillary is upright, mandibular is tilted back slightly
500
what projection does a lateral cephalometric show
shows the bones of the face and skull and the soft tissue profile
500
what happens if the patient does not stand or sit with a straight spine
the cervical spine will appear as a radiopacity in the center of the film, obscuring the diagnostic information
500
what is used to align the patient's teeth as accurately as possible when using the panoramic unit